Search  for anything...

SainSmart 4-Channel Relay Module

  • Based on 433 reviews
Condition: New
Checking for the best price...
$8.99 Why this price?
Holiday Deal · 69% off was $29.00

Buy Now, Pay Later


As low as $2 / mo
  • – 4-month term
  • – No impact on credit
  • – Instant approval decision
  • – Secure and straightforward checkout

Ready to go? Add this product to your cart and select a plan during checkout.

Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.

Learn more about financing & leasing here.

Selected Option

Free shipping on this product

30-day refund/replacement

To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.

To initiate a return, please visit our Returns Center.

View our full returns policy here.


Availability: In Stock.
Fulfilled by Amazon

Arrives Dec 23 – Jan 5
Order within 2 hours and 25 minutes
Available payment plans shown during checkout

Protection Plan Protect Your Purchase
Checking for protection plans...

Pattern Name: Module


Features

  • 5V 4-Channel Relay interface board, and each one needs 15-20mA Driver Current
  • Equipped with high-current relay, AC250V 10A ; DC30V 10A
  • Standard interface that can be controlled directly by microcontroller (Arduino , 8051, AVR, PIC, DSP, ARM, ARM, MSP431, TTL logic)
  • Indication LED's for Relay output status

Description

This is a 5V 4-Channel Relay interface board, Be able to control various appliances, and other equipments with large current. It can be controlled directly by Microcontroller (Arduino, 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic).

Connector Type: /


Contact Material: /


Contact Type: /


Current Rating: 10 Amps


Mounting Type: /


Connector Type: ‎/


Contact Material: ‎/


Contact Type: ‎/


Current Rating: ‎10 Amps


Mounting Type: ‎/


Brand: ‎SainSmart


Operation Mode: ‎Automatic


Wattage: ‎2.5E+3


Coil Voltage: ‎5 Volts


Contact Current Rating: ‎10 Amps


Maximum Switching Current: ‎10 Amps


Minimum Switching Voltage: ‎1 Volts (AC)


Specification Met: ‎/


Global Trade Identification Number: ‎13


Item model number: ‎101-70-101


Item Weight: ‎0.01 ounces


Product Dimensions: ‎4.5 x 3.2 x 1.19 inches


Item Dimensions LxWxH: ‎4.5 x 3.2 x 1.19 inches


Manufacturer: ‎SainStore Inc.


Is Discontinued By Manufacturer: ‎No


Date First Available: ‎June 23, 2011


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Dec 23 – Jan 5

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • This Device WILL KILL YOU.
Pattern Name: Module
The entire SainSmart line is well made, very well priced, and extremely functional, a great buy. Note that they also sell many other relays here on Amazon, including solid state. HOWEVER, when Amazon posts videos of guys "handling" the board with chasing LED's, and lists it as a toy, they are taking on extreme liability as well as endangering folks with less experience. These little monsters can handle 4x 220x 10A-- PLENTY OF POWER TO FRY YOU! DO NOT work with this as you would your 3.3/5 or 12v (low current) microprocessor boards if you're controllling A/C devices, appliances, etc.! Most folks know this, but for the few that watched the guy's video with him handling the board like a toy, be aware that you need to COVER AND SHIELD, THEN NOT TOUCH any components using A/C! Holding the business end of the relays is the equivalent of dropping 4 toasters in the bathtub-- VERY LIKELY FATAL if you're using the highest rated capabilities of this device for automation, control, etc. of high powered devices! Also for beginners, a "sketch" is what Arduino calls code, or a program. Some of this device's controls require sketches to select function, this is NOT a manufacturing error. Amazon gives a dot rar website in the description (you need to go to the Amazon AWS host of SainSmart to download it, then open it with WinZip-- rar is a compressed format. Do NOT download a "rar opener" from a site you don't know (WinZip is Corel)-- they are loaded with trojans, worms and viruses due to embedded zips in the files). The Sainsmart site is ONLY a .pdf schematic, no instructions are provided, but plenty are available if you check YouTube and the forums. NC and NO selections on this board mean "Normally Closed" and "Normally Open" -- there are some reviewers here who apparently didn't realize that this is a choice with this switch! If one or the other fries your micro or requires code or transistor work arounds, just select the other! Also, there aren't really two versions, 3.3 and 5, those also are selectable with either components or code-- see the schematic for details. Have fun, but realize this is NOT FOR KIDS if unsupervised by an adult that knows what they are doing! ... show more
Reviewed in the United States on March 28, 2013 by Professor dot biz

  • Works Perfect.......Here is a working Sketch!
Pattern Name: Module
This sketch will stop the Relays from toggling on reset... From arduino serial monitor numbers 0-7 control the relays and print back their state. Here it is, Enjoy! //From the Serial monitor- 0=Relay 1 off, 1=Relay 1 on, 2=Relay 2 off, 3=Relay 2 on, 4=Relay 3 off, 5=Relay 3 on, 6=Relay 4 off, 7=Relay 4 on void setup(){ Serial.begin(9600); //Set all the pins high so they do not toggle on Reset or Power on! digitalWrite(2, HIGH); digitalWrite(3, HIGH); digitalWrite(4, HIGH); digitalWrite(5, HIGH); //Set all the pins we need to output pins pinMode(2, OUTPUT); pinMode(3, OUTPUT); pinMode(4, OUTPUT); pinMode(5, OUTPUT); } void loop (){ if (Serial.available()) { //read serial as a character char ser = Serial.read(); //NOTE because the serial is read as "char" and not "int", the read value must be compared to character numbers //hence the quotes around the numbers in the case statement switch (ser) { {case '0': int pin(2); digitalWrite(pin, HIGH); Serial.println(" Relay 1 OFF");} break; {case '1': int pin(2); digitalWrite(pin, LOW); Serial.println(" Relay 1 ON");} break; {case '2': int pin(3); digitalWrite(pin, HIGH); Serial.println(" Relay 2 OFF");} break; {case '3': int pin(3); digitalWrite(pin, LOW); Serial.println(" Relay 2 ON");} break; {case '4': int pin(4); digitalWrite(pin, HIGH); Serial.println(" Relay 3 OFF");} break; {case '5': int pin(4); digitalWrite(pin, LOW); Serial.println(" Relay 3 ON");} break; {case '6': int pin(5); digitalWrite(pin, HIGH); Serial.println(" Relay 4 OFF");} break; {case '7': int pin(5); digitalWrite(pin, LOW); Serial.println(" Relay 4 ON");} break; } } } ... show more
Reviewed in the United States on March 16, 2013 by Jay

  • Great with Raspberry Pi!
Pattern Name: Module
Great with Raspberry Pi! This thing is super responsive. It's worth every penny and then some. It's been a great joy working with it. And the built-in LEDs (one per input/relay) help test the inputs. How do you use this thing? Connect VCC to +5v. Connect GND to ground. Connect any of IN1/IN2/IN3/IN4 to any of the GPIO/control pins. If the input LEDs don't light up, be really sure that you have VCC and GND connected correctly. Use a multimeter to verify this if you have one handy (and if not, buy one!). If you want to just test to see if the input works, connect any of the input pins to GND and it should cause the relay to click on and the LED for that input/relay to light up. If you don't get that, you did the VCC and/or GND wrong. If you're using this with a Raspberry Pi, all of these pins (GPIO, +5v, and ground) are on the P1 header. Assuming that the pin up against the P1 marker is pin #1 and the pin across from it is pin #2: +5v is pin #2, ground is pin #6, and then pick any of the GPIO pins. You'll have to look up the GPIO pins on a Raspberry Pi site since Amazon will strip out any links I put here. For example, GPIO4 is pin #7. By the way, this product is categorized as a toy but it obviously doesn't belong in this category. I would like to think that the person at Amazon that will be reviewing my review of this product will notice and do something about it. I shouldn't hold my breath. ... show more
Reviewed in the United States on July 19, 2012 by Emmaly

Can't find a product?

Find it on Amazon first, then paste the link below.
Checking for best price...